Expanded series of signal transformers for large energy storage devices and UPS

Würth Elektronik expands its WE-BMS transformer series for battery management systems with versions for an operating voltage of 1500VDC. The component design features enhanced isolation in line with IEC 62368-1 with triple-insulated wire (primary and secondary side), galvanic isolation and a test voltage of 6400VDC. All this makes the new models in the series ideal for use in large stationary energy storage systems from solar and wind farms, intermediate storage systems in high-power charging stations to balance out peak loads, or uninterruptible power supplies used in critical infrastructures.

Battery management systems ensure safe operation of battery packs and provide information on battery and charge status. The downstream battery management controllers are connected in series, as are the battery cells. As voltage differences and electromagnetic interference can arise between the components connected in series, a battery management system transformer helps isolate the components from each other and suppress interference. The company's latest BMS transformer series members guarantee this, even in systems with a high operating voltage of up to 1500VDC. The longevity of the enhanced isolation of the modules, as defined in IEC 62368-1, was tested using the partial discharge test in accordance with IEC 60664-1.